Device for hoisting and lowering loads



Jan. 19 1926. 7 1,570,442

H. KEIL DEVICE FOR HOISTING AND LOWERING LOADS Filed August 29,1921. 2 Sheets-Sheet 1 fl I W? Jan. 19 1926.

H. KEIL nnvxcm FOR HOIS'I'ING AND LOWERINGVLOADS Filed August 29, 1921 2 Sheets-Sheet 2 Patented ila n- I were CEOR-I-fQiS'lING ND gLow EEiNeej ii'o'aijs Tq all whom it may/concern: a: i

f Be itknownthat I,-;HER ANN I zen of Germany, and ;a;resident oi:';Ett1ngs v hausen,xGiessen County, Hesse,.- Ger1nany; 5 have nvented certaln new and useful-J1me;

provements in Devices;--.for gHoisting j'a nd Lowering Loads 1 (for which-i I ghavje filed an applicationsin Germanyone July; 21sfi,' 1920) and I do hereby declare-the follow-- in g to be a full, clear,= and exact description ofithe'inventiong such as will enable vOthers. skilled in the art to which itiap'pertain stto niakeand use the same, reference beingthad j t o the accompanying drawings, and, to letf ters or figures cof reference markedthereon,

- which forina part of t=hisl.,specificationl Thisinvention'i'sa lifting-"device for hoisting and lowering loads and theiobject of the invention is to provide a simple;;econom1ca1- ingluinber and; analogous uses Wherefit is desired to raise relatively heavy wei'ghtsfor:

be positioned in; the space between the.:si dc sections andv entirely with-in the {1311169130 permit the ldevice 5to,be gtransported in. a g

adaptedqtolie-in the';path of the Working most compact condition; J i 40 An important feature, of 1 thefinv-entlonr re'-; sides in a post-like ,frame: betweenthe side sections ofwhich' is mounted a Iwinch comprising a winding druni Wlt-hwhich is associated a ratchet adapted tobedrivenby-a pawl pivoted for bodily. lliOVGIllGIltfgLbOLlt "the ratchet and on the same axisofrotation' as theratchet. and drum for thepurpose of rotating the drum, "andthis pawl isoscil- Y lated about thisa-Xis byineans of-anoperating lever pivoted on a difierent aXisand adapted to'-,. operatejthe pawl through greater or lesserleverage as may be required.

and highly eff cient construction adapted, more particularly, forloadingland unload-i lever; arinufz; To theibolt tached wl'ii'ch-isrpressed onto the perforated .I'lIIl by Weight 12,1 hinged it'ofsaine in 'sucli sections is" mounted, a winch adapted -.to.-=be operated by, a handle ,or operating lever which, when I the, ,dev1cej'jis not iniuse, ;may I ina t r det iled description and claims steam. gee-e22.

whenQrkeadQy-fin conjunction .with' the acc'onr- ,anyi'ng drawingslz, i I p I --'In:the accompanying drawings; 1

Rigs, 1- 'andx2- are'r-bo h 'li ftingiposition; 7

.working leveriin its lowest position.

Ei'gs '5 and Gzare" details of the lowering g ar- 11' the working lever n its lowest side: elevations in id eelevations witli the he;; l 1oisting -Cl6 VlC 3 :J CbI1SlS tS of -tl1e up ght-timbe'rs Z :which in connection with" the he'adties mgform a postgwhiichiis'fitterl vvitli. the twoE-azjr'ltzbolts 10,570. in'sheet ni'etal fittings n- 'foithe, "gearing; IThe gearing consists of H a'hoisting roller 'k'iniounted on the axle bolt c fire ee e r 0;" said roller being .built; as shown: "with a 1 necting rod z'iis connectedrstoftheihoop-g and can be connected :withithe' holes of thewo'rk ing lever-fswinging on the lowerbolt ac:

cording tofchoice, ;so that the proper gearing a pawl a is pivotally atpiV edEinterrnedi-atei its ends atd. A-coir I may at once be switched by" setting 'the V manner? that the latter re'sting on'said pawl shifts the entire center of gravity into," the leverzarm opposite the-pawl"a,'=that isa-presses j the pawl- :up.- A hook '0 is' -'provided"on the that'it icanrbei -lifted; and bye slight 'shiftingfl to'the side be thrown: onto the hookJ-"A, catch 1-=(F1gs.'5 anc1 '6)-of'the"weightft is,"

lever Jf so thatwhen'the latter; is in the high est: posit on beg1'nning of lifting) thelatch 1S1 thrown coutgof the hookfl'o and the pawl a.

ti'onslof theliftingfroller is again 1 pressed up} t'o engage thej perfora '."For using:fthe winclnthe proper gearirig 5:100 I shouldfirstbe set by meansofi-theicoiinectring rod 71-, whereupon the load is raisedby moving wthe' working 5 lever up and*=dQw Hereby the force expendedisf utilized in" the Ward strdke' is' nhancd byx the weight cf ,I the body; Features of the inventlon other than those theframe andgth'e weight b swings s'o' loosely, 19

released falls out, whereupon the load is lowered by lifting up theworking lever 7, until the working lever striking the. catch 1." releases the weight b from the hook 0 thereby causing the pawl a to catch. The pawl h. is now disengaged and the working lever is then easily lowered without effort.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. A device for hoisting and lowering loads embodying a drum mounted for rotation, a ratchet associated with the drum, a carrier pivoted coaxially of the drum and ratchet, a pawl mounted on the carrier and adapted to cooperate with the ratchet, an operating lever pivoted on an axis, other than the axis of the drum, a link pivoted to the carrier and adapted to be pivotally secured to the operating lever at different distances from the fulcrum. of said lever, whereby power exerted through the link upon the carrier by the lever can be varied, a second pawl pivoted on the axis of the fulcrum of the operating lever and weighted to normally engage with the, ratchet of the drum for the purpose of precluding inadvertent rotation of the drum, a retainer for supporting the weight of the pawl while the operating lever is being oscillated in one direction to lower a load, and means associated with the weight 7 for automatically disengaging it from its retainer for the purpose of perinitting the pawl to re-engage the ratchet of the drum when the operating lever has reached the end of its weight lowering stroke.

2. A device for hoisting and lowering loads embodying a drum mounted for rotation, a ratchet associated with the drum, a carrier pivoted coaxially of the drum and ratchet, a pawl mounted on'the carrier and adapted to cooperate wth the ratchet, an

-. operating lever pivoted on an axis other than the axis of the drum, a link pivoted to the carrier and adapted to be pivotally secured to .he operating lever at different distances from the fulcrum of said lever, whereby power exerted through the link upon the carrier can be varied, a second pawl pivoted on the axis of the fulcrum of the operating lever and weighted to normally engage with the ratchet of the drum for the purpose of precluding inadvertent unwinding rotation of the drum, .a retainer for supporting the weight of the pawl, while the operating lever is being oscillated in one direction to. lower a load, the said weight on the pawl being provided with a projection adapted to automatically disengage the weight from the retainer for the purpose of permitting the'pawl to re-engage the ratchet of the drum. when the operating lever has substantially reached the end of its weight lowering stroke.

3. A device of the character describe embodyingawinding drum, mounted to rotate on a fixed axis, a ratchet associated with the drum, a pawl for actuating the ratchet, a lever fulcrumed on a fixed fulcrum, means associated with the pawl and adapted to be secured to the lever at dif ferent distances from the fulcrum of the lever while the lever remains on its fixed fulcrum, whereby power appropriate to the load maybe applied fromthe lever to the drum to effect a' step by step rotation of the latter,and a second pawl pivoted on the axis of the fulcrum of the operating lever and weighted to normally engagewith the ratchet of the drum for the purpose of precluding inadvertent unwinding rotation of the drum, a retainer for supporting the weight of the pawl, while the lever is'beingoscillated in one direction to lower the load, and means associated with the weight for automatically disengaging it from its retainer for the purpose of permitting the pawl to re-engage the ratchet of the drum: when the lever has sub stantially reached the end of its weight lowering stroke.

a. A device of the character described embodying a winding drum mounted to rotate on a fixed axis, a ratchet associated with the drum, apawl for actuating the ratchet, a lever fulcrumed on a fixed fulcrum, means associated with the pawl and adapted to be secured to. thelever at diflerent distances from the fulcrum of the lever while the lever remains on its fixed fulcrum, whereby power appropriate to the load may be ap plied from the lever to the drum to effect a step by step rotation of the latter, and a second pawl pivoted on the axis of the fulcrum of the operating lever and weighted to normally engage with the ratchet of the drum for the purpose of plecluding inadvertent unwinding rotation of the drum, a retainer for supporting the weight of the pawl, while the lever is being oscillated in one direction to lower a load, the said weight on the pawl being provided with a projec tion adapted to'automatically disengage the weight from. the retainer for the purpose of permitting the pawl to re-engage the ratchet of the drum, when the lever has substantially reached the end of its weight lowering stroke.

In testimony that I claim the foregoing as my invention I have signed my name.

HERMANN KEIL. 

